Question

Calculate the ΔS°rxn and ΔG°rxn for each of the following reactions, using the data for S° and ΔG°f in your appendix. a. 2 NO (g) + O2 (g) → 2 NO2 (g)

I'm not even sure how to look up these values...am I looking for Gf for NO, O2, and NO2??? Help!